[Bug c++/118264] GCC allows declaring constexpr template constructor in derived type with virtual base

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118264

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The ICE for 4.6.4 was:
<source>:9:32: internal compiler error: in build_data_member_initialization, at
cp/semantics.c:5553